How to reference functions only from the opened file NOT the whole workspace

[kkk-bot]

AS you saw the title, And the libraries too
I want to reference only the functions from the file that I'm currently opening AND the libraries I included in the Lua
When I hit Ctrl+Space I should see only functions from opening file and the libraries that I have included, how to do that?

[tomlau10]

I should see only functions from opening file and the libraries that I have included

I assume you are talking about global functions that implemented by you libraries.
AFAIK, no way if you are using LuaLS in a single workspace mode.

LuaLS treats this single workspace as a single (Lua) runtime. It means that it treats all lua files (which are not in workspace.ignoreDir) will eventually be required in the runtime. A single runtime means all globals will be shared and can be seen in any files. So there isn't a concept that only shows the globals imported by the libraries that you have included.

See another discussion here why LuaLS cannot dynamically add things to the global: #3187 (comment)

My personal advice is avoid using globals in your libraries 😇
Use module-export style:

• mylib.lua

local mylib = {}

function mylib.hello()
    print("hello")
end

function mylib.world()
    print("world")
end

return mylib

• main.lua

local mylib = require "mylib"

mylib. --> Ctrl+Space here will suggest `hello()` and `world()`
-- such that mylib.* will not pollute the global namespace

---

And if your project has different runtime/env for different set of files, you may also consider using multi-root workspace.
https://luals.github.io/wiki/developing/#multiple-workspace-support

This makes each set of you files have a separate runtime.
You can achieve something like client/ and server/ each requires different set of libraries.
Here is an example: #3030 (comment)